this is "piers morgan live." tonight, heroes, hope, and the big two questions. who did it and why? stories of courage and loss from the boston bombing, the city and the nation remembers the victims and searches for answers. i'll talk to grieving friends of 8-year-old martin richard and the bride and groom who escaped the marathon with their lives and said "i do" right afterwards. here's what we know, a photo taken by a member of the public

before the twin blasts shows a light-colored bag on the sidewalk next to a mailbox, they believe the bombs were in a dark-colored bag or backpack. federal law enforcement sources tell cnn the devices were inside pressure cookers and they believe bbs and nails were part of the explosives. the toll of injured up to 183, three more have died, including 8-year-old martin richard, and 29-years old krystle campbell. president obama will travel to boston on thursday. we have the remains of a pressure cooker, a shredded black backpack and some kind of ball bearings or metal pellets. what can we read into this at this stage? >> you are looking at what they

have in this investigation, which is the bombs themselves. apparently two very similar if not twin bombs placed in black nylon bags that they are recreating as much as they can. at quantico. the fbi lab. it is how, who did this and why that they really do not have any leads on. you are looking at forensic evidence, it will be very important when they catch this person. but in terms of trying to find that person, i think it will be more difficult as they recreate the bombs. they will have to figure out where some of this material may have come from. perhaps this will spark a tip from somebody who knows about somebody was working with pressure cookers or maybe has just put trust them. but right now, it all seems to be centered around the forensics and putting this all back together, these bonds back

together and try to figure out just how that operated and how they were put together. >> what would they be looking at here? the serial numbers? the brand? the size of the pressure cooker? what are the key things that you would be going after? >> the circuit board i would be very interested in. was this remotely detonated? if it was, it is the sophistication that might break up in this case. it is highly unusual and amateur will be able to put this together. somebody knew what they were doing. if they're using sophisticated electronics and it is a matter of at that point just looking at cell phone towers. various locations around there and then picking up pieces off the rest of it and it is amazing after week of this what they can do. they can reconstruct the bomb and they can find out and make the backpack. where the pellets came from.

with the explosives was. they can reconstruct this and you combine that with pictures and with time, a pretty good idea who did this. >> you can experience this, they have been used from everything i have read in afghanistan, and other forms of homegrown tear. anyone in america can get online and create one of these things. what we have seen tonight in terms of this photographic evidence, of the devices that went off, does it give us any more clear as to whether or not this is a domestic terror attack or a foreign terror attack? >> none at all. not at all. you are right. anybody can make one of these. anybody could acquire the chemicals or black powder. it is not registered. it is a matter of getting on the internet, following instructions and then as i said before practice.

and all of those things, someone who is fairly mechanical can do this. a couple of days' training. it is not going to help out all but i think once you've globally compare all of the information and start running algorithms, we are a lot better off today than we were two years ago. certainly. >> drew griffin, you have a pressure cooker of the type we believe may have been used. obviously popular devices. what significance is it that pressure cooker was used, the thing? >> i'll hold this up. if we don't know what type of pressure cooker was involved but i want to show people the size and what these look like in case they are not familiar and how easy and simple this is. you put it in any old backpack and walk around with it and you would never know someone is carrying a pressure cooker inside of a backpack. if i was holding this.

the significance is from what i am told from bomb experts, maybe bob knows this, it is much more complicated to pull off the pressure cooker bomb then it is to pull off a standard pipe bomb, which we have seen many times. they are mostly used in environments for the environment, whether it be the sand in the desert or the jungle, it would interfere with the explosive. that has been traditionally their use. that being said, these things are easy to find, easy to make. i don't have to tell you, you can look up on the internet and see the step by step instructions on to do that. and matter of assembling the various ingredients you would do to put it together. that to expand on what he was saying, they are getting a lot of evidence how the bomb was made but they don't have a lot of evidence about who did this or why.

the actual evidence that would lead to the person or persons involved. >> this suggests a slightly higher level of them what was first thought yesterday and if so, does that narrow down the net of potential suspects? >> it does. the black powder, the acetone, peroxide, you don't want to let it get went. absolutely right. you want to protect the explosives, the detonator. when this bomb went off, talked to a couple of people and their first reaction was what is happening to people coming back from afghanistan? they are terrified that american soldiers with four or five to worse will come back and be resentful of being dismissed and all of this. it was a strange way to look at it.

but i go back to the sophistication. i think when we finish with this, someone will say they knew what they were doing even if they were imitating a terrorist group. >> i was talking last night about this magazine, which is al qaeda sponsored magazine called inspire and in 2010-very detailed account, some graphics and on the screen now, of exactly how you could create and use a pressure cooker as a bomb and it says in the first edition called make a bomb in the kitchen of your mom, it says the pressurized cooker should be placed in crowded areas, more than one of these can be planted to explode at the same time. keep in mind the range of shrapnel of the operation a short range and the pressurized cooker could be placed close to the intended targets and should not be concealed from a barrier such as a wall. what do you make of that?

that is pretty specific device being published in a magazine that was believed to be created by al qaeda and its sympathizers. >> that is nothing new. the internet is a wonderful tool but it is also a terrible tool and anybody sitting in the basement right now could find out how to do these things. and magazines like that that have been around i think of the anarchist cookbook way back when that also taught many different things and i don't think you can read into anything about this possibly being al qaeda or not being al qaeda. the fact of the matter is here on the ground in boston, the fbi admits they don't know. they don't know if this is domestic or foreign or if it is along a wall for a group. that is why they are really reaching out to anybody in the public who has any suspicions

whatsoever about a boyfriend, about a girlfriend, about a son or a neighbor or anybody who may be involved with it. it shows you how they are in determining who did this, they are at square one although they have made terrific strides in determining how was done. >> and it could be a homegrown of some type with some allegiance or association to al qaeda as we saw in great britain very recently. on the phone a former top cop in miami and philadelphia. you have run a big city police organizations in many cities in america. what did you make of what happened here and what is your instinct about the type of personal -- persons or persons who might be responsible? >> right now, i think the fbi is taking the proper approach in that you leave your options open. hopefully, the evidence will take you where you need to go. i have run the boston marathon when i was the chief of new

york. it went off at 4:09. had that bomb, often our before, with the stands and the surrounding sidewalks would have been completely packed. people getting access there could not have done that. however later on, the three and a half hours the crowds stand out and somebody going in with a backpack would not draw attention. i am not saying that out yet happened but it could happen that way as opposed to somebody planting the bomb early before the race because they check things before the race. that would appear at least for me how it could've happened. the other part -- >> given the race is spread out over 26 miles and you have 27,000 competitors or however many it was and the huge crowd as well, it is a huge public event. it is impossible to be 100%

secure in these kinds of things. does it become the ultimate nightmare for any police chief because of that? >> it is. i planned and ran the new york city marathon six or seven times as the chief and an new york with huge crowds throughout 26 miles. there are about 5,000 cops out work in the marathon in new york. it is difficult. there are spots with vulnerability. it is different than a regular sporting event and a coliseum. in a baseball stadium where you have access or you can screen people and put in magnetometers. the marathon by its nature is open to the public and people are encouraged to cheer people on. people have bags of water and fruit, candy, a handout to the runners all along. if somebody is intent on doing harm, and a marathon is a pretty inviting than you.

>> i want to bring and david mackenzie with the family of the third victim of the bombing. what's been the reaction in china because people have been looking up on that as an attack on america. 96 different nationalities running in the race. indeed, one of the three dead turned out to be chinese. >> we know a lot about those first few victims. the third victim, very few details at all. we have learned it is a chinese national, they are not releasing the name out of respect for the family. what we know is she was a student at boston university. studying math and statistics. at the graduate level. she went there with three france to the finish line to enjoy the spectacle of the finish of the boston marathon. right as this explosion happened. one of her friends was badly injured.

we learned now she has come out and is able to speak and she is also a chinese national. the third was on hurt. there is an international dimension to the story. any terror attack targeting a public arena especially such a well-known worldwide spectacle like the boston marathon could target not just americans but internationally many people. certainly a shop in china and many people on social media expressing their anger and their shot at the event. >> thank you very much and thank you all. when we come back, sanjay gupta on herati struggles by doctors to save the victims of the bombings. everyone's hair breaks.

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moments after the twin blast was horrific, with the bombs designed to do maximum damage, and there were incredible efforts to help the wounded. dr. sanjay going joins us live in boston. i know you've been there for a couple days. it does seem to be bordering on minister rack louse this only three people have died in this. sol was injuries were so

appalling, we assumed the death toll would rise quite significantly. >> reporter: yeah, and i think those miracles come in the form of some good planning and a little bit of serendipity. remember at the end of the race, any marathon, they have a lot of medical capabilities on stand by. ambulances, medical triage tents, to be fair, what they're expecting to see is people who are dehydrated, an occasional person with difficulties with their heart, nothing like this. but these are medically trained professionals. several things happened, first of all, doctors and nurses and first responders were immediately able to come out to where these people were injured. and i'll remind you, you've talked about this, they came out after an explosion with no knowledge whether or not another one might occur. it was quite brave on their part. but they were able to get treatment to these people who were injured very quickly. and then the ambulances were able to get the patients to hospitals that needed that

medical care much more quickly. you know, i was at brigham women's hospital, one of the larger trauma hospitals in the area, 15 minutes of the explosion, not of the alert, they started getting their first patients. within 60 minutes, that golden hour, all the patients that were going to come did arrive. so it happened just like it should. we've heard a lot about what happened in the field, people performing these really selfless brave acts to try and save people's lives. but when they got to the hospital, a whole process informs motion, operating rooms opened up, er beds, people called in to provide additional resources. i talked to the chair of the emergency department, at the hospital, and asked him to talk about what things looked like when patients arrived. listen to what he said. >> so we would have a team here,

a trauma surgeon, an emergency physician, an emergency medicine resident, surgical resident, at least two nurses, and at least one emergency services assistant who are technician who is help us take care of the patients. so we would get a quick report from the paramedic, they would give us a quick summary, and the most important issue of the summary for us is if it's not obvious how much blood loss do you think there was. what has the patient been like in terms of blood pressure and pulse. that helps us guide how quickly we need to move on them. >> number one, piers, they want to control the airway, a, breathing, b, and c is circulation. to so no matter the type of injury, trauma care is the abcs, airway, breathing, circulation. that's what he was describing there. >> so i suppose one of the more fortunate aspects of what happened is there were so many medical people and ambulances

and so on in the immediate vicinity anyway because it was a marathon. that coupled with the speed of the first responders and the medics at the various hospitals. that must have saved quite a few lives, sanjay. >> reporter: yeah, there's to question. and i'll tell you, i've talked to so many doctors now, some of these are seasoned physicians, they've been working in the job for 20 years, some of them are brand new, still in training, and you hear a common sentiment, and i've seen this myself in my practice and when i've covered these stories abroad, you do the job. go in there, they can recognize what the issue is, what the injury is, and they do the job. but after some time, they do get an opportunity, piers, to reflect on what has happened as well, and to sort of recognize the scope and magnitude of it. i talked to three residents, doctors in training, and these were doctors very much on the front line of this, these are

the guys waiting when they got there. one of the women you're about to meet was at the race, volunteering her time. she's an er emergency room resident. i asked them what things have been like today a full day later. take a listen. >> we were improvising a lot, specially, town kit, dealt belts, anything you could find. >> there was a waiting period where we were waiting for more patients to get there until we got word this was it, we had done our job. that was the point where i think i started feeling it. >> i didn't get a chance to really consider the humanity, and the human cost of what happened. it was not until everything died down and went home, and i thought about what this meant, not only did a child die and adults die and people lose limbs, but there's a sense of innocence that was lost yesterday.

>> reporter: it's a sentiment, piers, that i think is going to become more common. they call this the heroic period, you have a lot of people rallying around each other, you are doing a show on what's happening here, a lot of news coverage. but over time, some of that is going to dissipate, and these thoughts will set in more and more, so we have got to continue to remind ourselves of that. >> definitely, hideous injuries, astounding bravery. thank you very much. >> thank you. >> it brings back memories of the olympic bombing in atlanta. christine brennan was in her hotel room overlooking the park when it went off. it must have brought back awful memories of atlanta for you. >> it did. when i first watched the video that we've seen over and over of the blast 12 seconds apart, the sound hit me.

the sound from my tv set watching the video yesterday, and i said boy, i've heard that sound before. and it was that night early in the morning, actually, in july of 1996, the media hotel was right next to the olympic park. and a band was playing, and i had just come back from the swimming venue, getting notes together, i heard the explosion, looked out the window, first thought maybe it was part of the act of the band, the sound, the noise. and i kept looking. and within a few seconds i started see the police cars and the column of emergency vehicles coming to the olympic park. >> there are obviously a lot of changes made to american sporting events after what happened in atlanta, and you could argue we have been very, very fortunate there's not been anymore terrorist outrage at a sporting event since then in the united states. there's been one now, do you think they'll have to be even more stringent security going forward? in most of these sporting fixtures now? >> i do think that.

although when you think about most stadiums you go into in the united states and around the world, you go through metal detectors, fans, tickets have bar codes, there's more security when you go into a sporting event than there is going into a shopping mall or a movie theater. i think that makes a lot of sense. it goes back to the 1972 olympics where the 11 israeli coaches and athletes were killed. from that moment on, the olympics had stringent security. that was a good 20 to 30 years before most stadiums did. a marathon, 26 miles, 385 yards, how in the world -- you cannot guarantee that all that length that entire distance in a city will be safe. >> no, you can't. sports obviously hugely competitive. there's been really touching moments today. we saw the yankees paying tribute to the red sox, and the

chicago tribune to all the boston teams, a very special tribute there in the paper. but the yankees one in particular really struck me, because i'm a die hard arsenal soccer fan, and picture a scene where we would play the rival hot spurs song. and i would find it pretty hard to believe any british soccer team would do that. this must have been extraordinary. >> absolutely, sweet caroline, being played at yankee stadium. when i heard about this, i got a tear in my eye, and i think it speaks to how we come together. it sounds like a cliche. but we do rally and come together. yankees, red sox means nothing. it's a fierce rivalry, but they're all together as one. it was a wonderful moment.

>> it was. and the global impact of this story, at arsenal tonight, they played a game today, they had a minute of silence for the victims in boston. that's been replicated all over the world. thank you very much for joining me. >> thank you. >> coming up, remembering with the emotional interview with the grandmother of krystle campbell.

the person who did this is someone's friend, neighbor, coworker or relative. we are asking anyone who may have heard someone speak about

the marathon or the date of april 15 in any way that indicated he or she may target the event to call us. someone know who is did this. >> who did it and why. that's what everyone wants to know. authorities are hoping they can get one step closer to solving this horrific act of evil. cnn's chris cuomo is live in boston. chris, here we are 24 hours or more later, and nobody seems to have a real clue who has done this or why. >> reporter: but that shouldn't be surprising. these investigations take a long time to develop. especially starting with this, no group claiming responsibility, so much ground to canvas. this is going to be a difficult investigation. i think it's good news that the authorities said they're in no rush. very often, haste makes waste when it comes to an investigation. this will take time. get it right. >> that's true, but some people in boston are concerned for their safety.

that the perpetrator is still at large. >> absolutely true. that's what they believe at this time. but what is also true is that there has never been as large a military and police presence in this city as right now. they ask for patience, they are trying to collapse the zone they are keeping closed so normal life can go on. but there is a huge security presence here, this should be the safest city in the world right now. >> it does seem a complete miracle, and probably a testament to the brilliance of the first responds are and the speed they moved, and the medics involved that the death toll remains so low. injuries were so appalling to so many others. >> absolutely accurate. it's one facet of a story that

keeps giving us extraordinary detail. for example, we know now the three people who were lost, who's lives are gone. hopefully no more, those struggling for their lives. one of them, crystal campbell, 29 years old, loved by the people at per restaurant, we sat down with her grandmother to find out who she was rather than just how she died. she said she was her favorite and she knows she was an angel. take a look. what do you think when you see this photo? >> beauty. >> reporter: what was she like in high school? >> smiling all the time. all the time she smiled. no matter what happened, she'd come out with a smile. i used to dress her up, i used to love to dress her up and put her hair in curls and lots of bows on her hair.

she loved it. she'd go out prancing proud as anything to school. and then in school the teachers would say, oh, you look so beautiful, who did your hair? my nana did my hair. >> reporter: you had a special bond. >> yes. >> reporter: how did she make you feel? >> full. my heart and soul. she was. and she made me feel that way, she made me happy. i used to look forward to her coming over to see he me. >> reporter: and as she grew up, she still came, she was with you. >> she still came and made me feel the same way, happy. >> reporter: what kind of young woman did she become? >> smart, ambitious, and loving. she wanted -- she never complained what she wanted. or talked about it that much. she said, just take one day at a time, nana, see what happens.

>> reporter: she took life as it came. >> she loved life. >> reporter: lots of friends? >> lots of friends. lots of friends. her disposition, her -- her attitude, and her bubbliness, she was so bubbly all the time, and laughing. >> reporter: when she got a little older, there was a time when you got a little sick, and she was there for you. >> yes, definitely. >> reporter: tell me about it. >> when i came home from the hospital she came over and said, nana, i think maybe i want to move in with you. so i said why, she said, well, i just figured that you should

have somebody with you here to stay with you, make sure you're okay. i said you really want to do that? your whole life is ahead of you. she says -- i'll make it, i'll arrange it so that i'll be here with you. >> reporter: what did that mean to you? >> everything. it did me so well, because i felt good, and i felt comfortable, and safe with her in the house with me. >> reporter: solidified her as number one, too, right? that was it after that. everybody else was in a race for second. >> exactly. >> reporter: what do you think when you see her on tv? >> i wish i could grab her and kiss her and hug her. i can still feel it. >> reporter: how do you make sense of this? >> i don't. i don't make any sense of it at all. i can't believe it happened. i can't believe it. i won't even accept it now and i'm sitting here with you. i'm having a hard time when i see her on the tv.

it's killing me inside. >> reporter: it's not real. you can't believe that something like would have happened to someone you love so much. >> that's the farthest thing from my mind. >> reporter: how do you want to remember her? >> with love. all my love will be there forever. my heart, she's in my heart, also is, all of them. that's my krystle. and she will be mine. i love her. i love all of them, but she's my special one. >> reporter: break yours heart. she went to the marathon to have fun like every year. but grandma wanted to talk. she wanted her to be defined by more than just her death. so we have an 8-year-old little boy, could be anybody's son, a student, a graduate student, and krystle, 29 years old. these stories remind us to connect, to understand what it

means, to value the people that are no more after these situations, and we really do thank that special grandma for sitting down with us. >> it was a moving interview. coming up with the scene of the horror, talk to eyewitnesses, and a hero who raced to save the victims. [ woman ] we're taking downy to the streets. which shirt feels more expensive? that one's softer. it's the same t-shirt. really? but this one was washed in downy. why spend a lot of money when you can just use downy? [ woman ] downy's putting our money where our soft is. try downy softness. love it or your money back.

♪ sweet caroline ♪ good times never seemed so good ♪ >> the yankees paying tribute to the victims of boston, the traditional sing along at fen way park. and then cleveland, a moment of silence for those killed and injured in the bombings. tonight we have incredible stories of survival and heroism. tonight with me, kevin and john who helped rescue injured by standers. you wrote a moving piece today saying we lost our innocence in september 12 years ago, and monday that is the idea that we will feel totally safe in the city again. is that how most people in

boston feel today? >> well, piers, i think when i wrote that, i probably was a little more despondent than i should have been. i was sad yesterday, i was sing today. i got that sense from the city talking to people. we will never be the same, new york will never be the same after 9/11. but that doesn't mean whoever did this has won, has cowed us. because this is a very tough town. you know, we take only three things seriously here, and that's sports, politics, and revenge. and i think it's going to take a lot more than what was done yesterday to knock a town like boston out. and i really sense that around -- across the city today. people were angry, and that people were absolutely determined, you know, i was in oma in northern ireland in 1998

three hours after the bomb went off, and i was in london within hours after the 77 bombings, and what i experienced in oma and london after those atrocities i experienced today in my home town. and it was a deep sadness followed by a resoluteness that these people will not get to us. we will not let them win. and i will predict, next year, we will have the biggest boston marathon ever. they will have to turn people away, people will come from all over the world as they do, but in greater numbers because we need to show whoever did this they did not win one thing. >> i totally endorse those words. john mixson, you were with your friend, we have seen lots of images of carlos in the cowboy hat performing acts of courage, as did you. you were standing in the first row of the bleachers when the bomb went off.

what was your reaction, you are a vietnam veteran, you have been in war zones. >> i just immediately thought it was a terrorist attack. i kind of lost my balance on the step, and my immediate thought was my daughter was heading down to -- to meet us down there, and i just quickly grabbed the phone to call her. and then there was such confusion that i -- i actually jumped over the fence, and i saw carlos, and he kind of blessed himself and pointed across the street, we both ran over there. and i was starting to rip the fence down, and carlos didn't wait for the fence, he scaled over the fence and over the scaffolding, and started to attend to some of the victims. i knew i didn't have any first aid training, so there was -- it was only -- i was trying to remove the fence and didn't know what i was going to do after that.

to something you added that mr. collins said, i ran the new york city marathon two months after 9/11 with the boston marathon race director, with david, and he's right, there was a huge turnout, even though it was only two months after 9/11. >> it is. kevin, it does change everything. but out of terrible incidents like this, as you hinted at, you can have a renewed strength and renewed sense of spirit through cities like boston, and i'm detecting that. i have to say, from the people you have talked to, what is the feeling? is it one of not just resolution, but determination not to be beaten? >> determination not to change our lifestyle, not to make -- not to give into the intimidation at the heart of all terrorist acts. terrorism is about creating fear and making you change the way you live.

and we will not do that. i refuse to do that. the day after the 77 bombings, piers, i rode the tube. and today i walked -- i walked through the back bay, up and down, obviously boylston street was sealed off, but there are people doing the same thing. one guy, a young guy playing a lovely alto tax, walking up the street playing over the rainbow and great jazz standards. that was the attitude. the best way to give it, boston gives -- we gave the middle finger to those guys whoever they are. we refuse to change. >> thank you both very much for joining me. >> thanks. >> coming next, love conquers hate. a couple married shortly after running the boston marathon. [ male announcer ] this is joe woods' first day of work.

and his new boss told him two things -- cook what you love, and save your money. joe doesn't know it yet, but he'll work his way up from busser to waiter to chef before opening a restaurant specializing in fish and game from the great northwest. he'll start investing early, he'll find some good people to help guide him, and he'll set money aside from his first day of work to his last, which isn't rocket science. it's just common sense. from td ameritrade.

the horror in boston changed lives and ended lives. in the face of evil, an

extraordinary story of hope and love being told by kelly johnson jon u.n. johnston. they ran the marathon and determined to get married after the race. that's what they did. kelly and robert are joining me live. welcome to you both. >> thank you. >> an uplifting story among the tragedy and despair. i know it was your plan to get married, once you realized what had happened, did you have any doubts that you should go through with it? >> well, we -- we were not going to cancel our wedding, but we did think about postponing it or coming up with alternative plans. we were hearing all sorts of things about that they may evacuate downtown or boston common may be closed. we had reservations for dinner after our ceremony, would they be open? we did consider, you know, alternatives. but in the end, we -- we didn't want, you know, if this is an act of terrorism, we did not want that to alter us. we were going to proceed one way

or the other. >> robert, when you realized the scale of what happened, utter horror and devastation everywhere, did that make you more determined to go through with this? as kelly said, to make sure the terrorists didn't win? >> absolutely. terrorists, their ultimate goal is to alter our way of life and stop us from carrying out our normal activities. i was even more determined when we figured out it was an act of terrorism, we were not going to be deterred from forging forward and proceeding with how wedding. >> kelly, you're both very active runners, and you wore athletic gear to the wedding, it was a big part of your lives. this is a clear assault on so many athlete's love, what do you make of the people or person who did this?

>> right now you can't make sense of it. there's so many questions. this today has been filled with all sorts of emotions for us. you know, from elation of what we accomplished yesterday, both at the race and our wedding, but, you know, going to the opposite extreme, just such sorrow and grief for all of the victims. and even the people that couldn't finish. you know, they -- everybody running the race yesterday put in a ton of hard work to get here, so to not be able to complete it would be frustrating for me as well. so it's -- it's indescribable, really. >> it's a -- >> over to you. >> it's an unimaginable act. and i couldn't imagine what kind of monster would do something like this.

>> it is unimaginable and monstrous, but i think your story is uplifting. it's great you stuck to the plans, defied the terrorists, weren't going to change your happy day at end. and i think everyone will be delighted you didn't. i congratulate you both on becoming husband and wife. well done. >> thank you. >> thank you. >> we'll be right back with more on the boston bombing. u 8